C3is Inc. - Common Stock, $0.01 par value (CISS)

Historical Holders from Q1 2025 to Q3 2025

Symbol
CISS on Nasdaq
Type / Class
Equity / Common Stock, $0.01 par value
Shares outstanding
4,436,567
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares, excl. options
127,735
Holdings value
$273,717
% of all portfolios
0%
Number of holders
3
Number of buys
3
Number of sells
3
Average buys %
+0%
Average sells %
-0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of C3is Inc. - Common Stock, $0.01 par value (CISS) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Imperial Petroleum Inc./Marshall Islands 74% +7.5% $53,415,697 +$44,595,697 36,337,209 +506% Imperial Petroleum Inc. 29 Dec 2025
L1 Capital Global Opportunities Master Fund, Ltd. 10% $651,523 443,213 L1 Capital Global Opportunities Master Fund, Ltd. 11 Dec 2025
S.H.N. Financial Investments Ltd. 10% +243% $864,265 +$719,624 443,213 +498% S.H.N. Financial Investments Ltd. 11 Dec 2025
Athanasios Tsiakmakis 14% $330,150 155,000 Athanasios Tsiakmakis 16 Sep 2025
Flawless Management Inc. 3.7% -43% $229,316 100,577 0% Harry N. Vafias 09 Oct 2025
Pandora Consultants II SA 2.7% $97,917 42,946 Nikolaos Vafias 30 Sep 2025
As of 30 Sep 2025 C3is Inc. - Common Stock, $0.01 par value (CISS) has 3 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 127,735 shares of 4,436,567 outstanding shares and own 2.9% of the company stock as of 30 Sep 2025.

Top 6 institutional shareholders of C3is Inc. - Common Stock, $0.01 par value (CISS) own 2.9% of the company based on 13F filings as of 30 Sep 2025

Filer Ownership Holdings Value Nb Shares Share Change %
WEXFORD CAPITAL LP 2.5% $240,160 112,014 +460%
CITADEL ADVISORS LLC 0.3% $28,557 13,221
FNY Investment Advisers, LLC 0.06% $5,000 2,500
TOWERVIEW LLC 0% $0 0 -100%
SBI Securities Co., Ltd. 0% $0 0 -100%
UBS Group AG 0% $0 0 -100%

Institutional Holders of C3is Inc. - Common Stock, $0.01 par value (CISS) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price Investors
2025 Q3 127,735 $273,717 +$173,760 $2.14 3
2025 Q2 37,401 $122,675 +$122,574 $3.28 4
2025 Q1 31 $20 +$20 $0.6452 1